The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
An important problem in image processing is to construct a cross section of an object from several images of its transaxial projection. However, the time consuming and the complexity of the reconstruction process are the crucial problems. In addition, the reconstruction process requires very high performance of the computer. Therefore, in this paper, a concept of parallel programming method is employed...
Tomographic imaging is a technique for exploration of a cross-section of an inspected object without destruction. Normally, the input data, known as the projections, are gathered by repeatedly radiating coherent waveform through the object in a number of viewpoints, and receiving by an array of corresponding detector in the opposite position. In this research, as a replacement of radiographs, the...
We propose a near lossless representation of digital mammograms using the wavelet footprint basis, that can simultaneously enhance the diagnostic features of the mammogram and yield some compression. Our simulations on sample mammograms show that this representation can achieve upto a 4times reduction in the number of samples required. The mammograms reconstructed from this representation have peak...
This paper proposes a surface fitting algorithm for inspection of flat panel display(FPD) based on multilevel B-spline approximation (MBA). FPD devices have non-uniform background, and shape and intensity of defects are very various. MBA is useful algorithm for surface fitting but it is sensitive to number of control lattices. As level increases, details of original image can be reconstructed. To...
This paper presents an effective method to convert the conventional floating-point algorithm of the FBI Fingerprint Compression into a fixed-point algorithm suitable for digital signal processors. Wavelet transform, the most computationally expensive component of the technique, is optimized to reduce the computational burden significantly. The conversion and optimization are tailored to fit the advanced...
This paper proposes a topologically robust and accurate shape modeling procedure that approximates a real 3D object, based not on the widely used so-called ICP (iterative closed point) algorithm, for the noise resistive modeling and especially for the organized and matrix-formed meshing, enabling the quantitative 3D shape modification easy. A geometric model with desired meshing is directly reconstructed...
We present a novel method for merging of images from different sensors or defocussed images from same sensor. In this purposed method discrete multiwavelet transform (DMWT) has been used for decomposition. The advantages of DMWT is its sensitivity to different kinds of object features in images and it does precise image analysis than wavelet multiresolution analysis. The purposed algorithm assumed...
This paper presents the mathematical framework of radial Tchebichef moment invariants, and investigates their feature representation capabilities for pattern recognition applications. The radial Tchebichef moments are constructed using the discrete orthogonal Tchebichef polynomials as the kernel, and they have a radial-polar form similar to that of Zernike moments. The discrete form of the moment...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.